Home / 78,055.53-117,083.30-18,891.21

Finding the Fourth Proportional to 78,055.53, 117,083.30 and 18,891.21

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Solution

The fourth proportional to 78,055.53, 117,083.30 and 18,891.21 is: 28,336.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,055.53 : 117,083.30 = 18,891.21 : x
  2. Step 2: Convert to fraction form
    78,055.53/117,083.30 = 18,891.21/x
  3. Step 3: Cross multiply
    78,055.53x = 117,083.30 × 18,891.21
  4. Step 4: Simplify right side
    78,055.53x = 2,211,845,207.79
  5. Step 5: Solve for x
    x = 2,211,845,207.79/78,055.53
  6. Step 6: Final answer
    x = 28,336.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.